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The text explains the rationale for distributing English preparatory problems, outlines required safety aspects and minimum counts of theoretical and experimental tasks, and describes editorial efforts to unify SI units, correct certain numerical issues, and maintain the intended pedagogical format. It also clarifies responsibility for scientific content and anticipates continuation of the series.",{"@graph":69,"@context":123},[70,84,106],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":20,"@type":76,"position":81},"https://docshare.wps.com/document/exam/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/the-preparatory-problems-from-the-international-chemistry-olympiads-series-3-preface/394189/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/the-preparatory-problems-from-the-international-chemistry-olympiads-series-3-preface/394189.png","ImageObject",300,407,{"name":92,"@type":93},"Grenda","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-02","2026-09-26",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",11,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"What is the stated purpose of the preparatory problems distributed for the IChO?","Question",{"text":113,"@type":114},"They give participating students a good idea of the type and difficulty of competition tasks, including safety aspects, and help them prepare before the competition realization.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"What requirements are mentioned regarding the format and content of the preparatory tasks?",{"text":118,"@type":114},"The organizers distribute the tasks in English; SI units should be used throughout; and the total numbers of theoretical and experimental tasks cannot be lower than specified minimums.",{"name":120,"@type":111,"acceptedAnswer":121},"What editorial work was done when compiling Series 3 (2001–2005)?",{"text":122,"@type":114},"The editor had to adapt past recordings into a form usable in teaching and education, apply SI units and required conventions, and make limited corrections where original numeric results were obviously incorrect or where small formal changes were needed to unify presentation.","https://schema.org",{"og:url":83,"og:type":125,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":127,"canonical":83},"index,follow",{"doc_id":129,"site_id":62},394189,1791153823,{"code":4,"msg":5,"data":132},{"doc_id":129,"user_id":133,"nickname":92,"user_avatar":134,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":105,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":19,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":52,"preview_page_count":4},7971474921005,"https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0","THE PREPARATORY PROBLEMS FROM THE INTERNATIONAL CHEMISTRY OLYMPIADS  \nSeries 3  \n33rd – 37th IChOs  \n2001 – 2005  \nP R E F A C E  \nEdited by Anton Sirota  \nIChO International Information Centre  \nIUVENTA, Bratislava, 2018  \nTHE PREPARATORY PROBLEMS FROM THE INTERNATIONAL CHEMISTRY OLYMPIADS, Series 3  \nThe preparatory problems from the 33rd – 37th IChOs  \nEditor: Anton Sirota  \nIChO International Information Centre, Bratislava, Slovakia  \nISBN 978-80-8072-172-5 Copyright © 2018 by IUVENTA  \nIssued by IUVENTA in 2018  \nwith the financial support of the Ministry of Education of the Slovak Republic  \nNumber of copies: 200 Not for sale.  \nYou are free to copy, distribute, transmit or adapt this publication or its parts for unlimited teaching purposes, however, as it is usual and required in the chemical literature , you are obliged to attribute your copies, transmissions in internet or adaptations with a reference to:  \n\"The Preparatory Problems from the International Chemistry Olympiads, Series 3\", Edited by Anton Sirota, Iuventa, Bratislava, 2018”  \n. The above conditions can be waived if you get permission from the copyright holder.  \nInternational Chemistry Olympiad  \nInternational Information Centre IUVENTA  \nDirector: Anton Sirota Karloveská 64  \n84258 Bratislava 1 , Slovakia Phone: +421-907-473367  \nE-mail: [anton.sirota@stuba.sk](anton.sirota@stuba.sk)  \n[Web: www.icho.sk](Web: www.icho.sk)  \nP r e f a c e  \nIt is stated in paragraph 10 of the Regulations of the International Chemistry Olympiad that:  \n“The organizer distributes a set of preparatory tasks written in English to all participating countries in January of the competition year. The preparatory tasks are intended to give students a good idea of the type and difficulty of the competition tasks, including safety aspects. SI units should be used throughout the preparatory tasks.  \nThe total number of theoretical and experimental tasks in the set of preparatory problems cannot be lower than 25 and 5, respectively.”  \nThat is the reason why the organizers must devote sufficient attention to the preparation of the preparatory problems since they give a certain picture about the level of the competition still before its realization.  \nThis publication contains the preparatory problems from the International Chemistry Olympiads (IChOs) organized in the years 2001 – 2005. In the elaboration of this collection the editor had to face certain difficulties because the aim was not only to make use of past recordings but also to give them such a form that they may be used in pedagogical practice and further chemical education.  \nNot less than 140 theoretical and 33 practical preparatory problems were prepared and published by the organizers of the mentioned IChOs. Consequently, a great number of authors from different countries and universities were involved in their preparation and gave them a final shape and structure. Naturally, it left some traces on the composition and presentation of the text of the tasks and their solutions and it was necessary to make some corrections in order to unify the form of the problems.  \nFirst of all, SI quantities and units are used in this publication as it is required by the regulations of the IChO. Only some exceptions have been made when, in an effort topreserve the original text, the quantities and units have been used that are not SI.  \nRecalculations of the solutions were made in some special cases only when the numeric results in the original solutions showed to be obviously not correct. Although the numbers of significant figures in the results of the problems do not obey sometimes the criteria generally accepted, they were left without changes.  \nNevertheless , some small formal corrections made in the text of the original preparatory problems do not concern their contents and language and, therefore, the  \nresponsibility for the scientific content and language of the problems lies exclusively with the authors and organizers of the ","cbCaicrlAAUCtr18","https://ap.wps.com/l/cbCaicrlAAUCtr18","pdf",215814,"English","# Preface\n## Purpose of the preparatory tasks\n## Editorial approach and corrections\n## Intended audience and next series","[{\"question\":\"What is the stated purpose of the preparatory problems distributed for the IChO?\",\"answer\":\"They give participating students a good idea of the type and difficulty of competition tasks, including safety aspects, and help them prepare before the competition realization.\"},{\"question\":\"What requirements are mentioned regarding the format and content of the preparatory tasks?\",\"answer\":\"The organizers distribute the tasks in English; SI units should be used throughout; and the total numbers of theoretical and experimental tasks cannot be lower than specified minimums.\"},{\"question\":\"What editorial work was done when compiling Series 3 (2001–2005)?\",\"answer\":\"The editor had to adapt past recordings into a form usable in teaching and education, apply SI units and required conventions, and make limited corrections where original numeric results were obviously incorrect or where small formal changes were needed to unify presentation.\"}]","THE PREPARATORY PROBLEMS FROM THE INTERNATIONAL CHEMISTRY OLYMPIADS - Series 3 - Preface | PDF",1790399879]